Musical instrument effects pedal



FIG. 1 is a top plan view of a musical instrument effects pedal showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof; the right side being a mirror image thereof; and,

FIG. 4 is a rear elevational view thereof.

The bottom plan view is unornamented and forms no part of the claimed design. 

The ornamental design for a musical instrument effects pedal, as shown and described. 